Here are some examples of Oracle alter table syntax to modify data columns and note that you can add constraints like NOT NULL: ALTER TABLE customer MODIFY (cust_name varchar2(100) not null, cust_hair_color varchar2(20)) ;
Did Sir Isaac Newton write any books? His best known book is Principia (Philosophiae Naturalis Principia Mathematica) published in 1687; which includes his laws of motion. Edit
Considered one of the greatest scientific minds of all time, mathematician and physicist Isaac Newton formulated theories about motion, gravity and calculus, among a range of other topics. The son of an illiterate farmer, Newton also was a temperamental loner and often secretive about his work. Find out more about this fascinating Englishman, from his long-term interest in alchemy to the job he held that involved sending people to the gallows to the cause of one of his most bitter rivalries.